Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
EPS:
Net income	$ 748	$ 731	$ 1,408	$ 1,231
Less: accrued preferred stock dividends	(19)	(19)	(38)	(38)
Net income available for common shareholders	$ 729	$ 712	$ 1,370	$ 1,193
Earnings per common share - basic and diluted	$ 0.15	$ 0.15	$ 0.28	$ 0.25